I have a 351W, trick flow heads, edelbrock Performer RPM manifold, Holley Averger 670 cfm carb. What happens is----- I start the car when it is cold and the fuel pressure goes right up to 6 pounds. I have a Jeg's gauge mounted by the carb. After 10 minutes of idleing the pressure starts to drop to 1-2 pounds and air forms in the clear fuel filter about 1 foot from the carb. So I bought a Carter high volumn mechanical pump. Same problem. So I bought an Edelbrock 110 gph mechanical pump and insulated the pump and the fuel line. Same problem. So I spent $350 on AN-8 stainless steel braided line with a Fram racing fuel filter and a Holley blue electric pump. Mounted the pump and filter by the gas tank as per the instructions. Wow is that thing loud!!! Well I fired it up, adjusted the regulator to 6 psi and guess what. Same problem!!! Is the gas boiling in the carb or what? I then let the car cool down and I ran the electric pump for 10 minutes without starting the car. The pressure held perfectly. Help please. I would like to be able the run the juice that has been sitting in the trunk laughing at me. I have the nitrous plate below the carb and nothing else.